生成的密碼哈希:
Email: admin@example.com
Password: admin123
Hash: $2y$10$3aup010mgfR6.gWmXUfF8.c1sttkSunqcBfk9083ImM5pIUicpza.

Email: teacher@example.com
Password: teacher123
Hash: $2y$10$MoNbJb1B5zfeLPu0oU0A4ul5lZDOhoyRc3kdfQ15eUV0FYGRoH7TS

Email: student@example.com
Password: student123
Hash: $2y$10$2MhagFSjyQdEINm8HJRXJOQS4G8XVtlmRJRhZRnWvhDUn9NUvpQ7a